A/D converting circuit with inverse proportion characteristic physical quantity

Abstract

The present invention discloses an A / D converting circuit with an inverse proportion characteristic physical quantity, which comprises an analog signal input circuit (1), a standard signal generator (2), an inverse proportion amplifying circuit (3), a timing pulse generator (9), a control signal generating circuit (6) and a gate circuit (7). The present invention is characterized in that the output end of the analog signal input circuit is connected with the input end of an inverse proportion amplifying circuit; the inverse proportion amplifying circuit receives an analog signal output by the analog signal input circuit and outputs the analog signal to a timing pulse generator after carrying out inverse proportion amplifying; the timing pulse generator converts an analog amplifying signal into a timing pulse and outputs the timing pulse to a control signal generating circuit; the control signal generating circuit outputs a gate control signal to agate circuit and simultaneously outputs a latch signal as well as a resetting signal to an external counting latch display circuit; the gate circuit outputs a count pulse signal to the external counting latch display circuit. The circuit of the present invention can be broadly applied to automatic detecting and automatic control systems.

Description

technical field [0001] The invention relates to the technical field of analog / digital conversion control, in particular to an A / D conversion circuit with an inverse proportional characteristic physical quantity. Background technique [0002] With the rapid development of electronic technology and the wide application of computers in automatic detection and automatic control systems, the use of digital systems to process analog signals has become more common. What electronic computers process and transmit are discontinuous digital signals, and In practice, most of the input signals are continuously changing analog quantities, so analog / digital conversion is required. The more commonly used ones in the prior art are: successive approach A / D conversion circuits, integral A / D conversion circuits, and voltage-frequency conversion A / D conversion circuits, but these circuits have their own shortcomings, among which The successive approach A / D conversion circuit has high cost and h...

AI Technical Summary

Problems solved by technology

The more commonly used ones in the prior art are: successive approach A / D conversion circuits, integral A / D conversion circuits, and voltage-frequency conversion A / D conversion circuits, but these circuits have their own shortcomings, among which The successive advance type A / D conversion circuit has high cost and high price in the case of high resolution; the conversion rate of the integral type A / D conversion circuit and the voltage-frequency conversion type A / D conversion circuit is low

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